The invention relates to a method of preparing a cone glass for a display tube.

Ideally a taper of 4.5 degrees in the bushing is preferable with less taper in the lens apertures when tapered lens apertures are utilized.

The conical has straight sides that flare out from the base and is sometimes called a shaker glass because it can be used as one half of a cocktail shaker.

The conical has straight sides that flare out from the base and is sometimes called a shaker glass because it can be used as one half of a cocktail shaker.

The conical portion comprises a glass component.

Erlenmeyer flask with ground-glass stopper, 250 ml.

10 ml test tube with a tapering bottom and a sealing glass stopper.

Test tube with a tapering bottom and a sealing glass stopper, 10 mL.

The invention relates to a method of preparing a cone glass for a display tube.

Cover the beaker with a watch glass or fit the conical flask with a reflux condenser.

In another embodiment the lens can also have a tapered aperture either convergent from the front to the back of the lens or divergent from the front to the back of the lens.

A taper angle is formed between the three-dimensional graphic layer (32) and the glass substrate (30).

Conical glass separation funnel with a content of 250 ml with Teflon or ground glass stopcock at the base of the cone.

Ideally a taper of 4.5 degrees in the bushing is preferable with less taper in the lens apertures when tapered lens apertures are utilized.

The neck portion comprises a glass component with a composition that is substantially the same as that of the conical portion.